Electric-lamp shock absorber



J. R. MOLE ET AL ELECTRIC LAMP SHOCK ABSORBER Filed June 1, 1923'EGEFEFGGEw 1 0 s flTToRNEY Patented Jan. 6, 1925.

UNITED STATES QUEBEc,

PATENT OFFIC J AMEs REGINALD MOLE AND WILLIAM ALLAN. COUGHLAN, orTHETFORID} MINES,

CANADA.

ELECTRIC-LAMP SHOCK ABSORBER.

Application filed June 4,

To all whom it may concern Be it known that we, J 5AMEs REGINALD MOLEand WILLIAM ALLAN CoUcHLAN, both subjects of the'King of Great Britain,and residents of the town of Thetford Mines, in the Province of Quebec,in the Dominion of Canada, have invented a new and useful Improvementin'an Electric-Lamp Shock Absorber, of which the following is thespecification.

The invention relates to an electric lamp shock absorber, as describedin the present specification and shown in the accompanying drawings thatform part of the same.

The invention consists essentially of the novel features pointed outbroadly and specifically in the claims for novelty followmg adescription containing an explanation in detail of an acceptable form ofthe in vention.

The objects of the invention are to reduce the-expense of lamp renewalsin factories and other places, to furnish a simple me chanioal devicethat will not materially add to the costs of an electric lightinstallation; to insure good and steady light and thereby avoidaccidents liable to cause damage to property and persons; to facilitatethe adaptation of the lamps in every lighting system; and generally toprovide a reliable and efficient support for an electric lamp and socketsubject tozvibratory movements.

In the drawings, Figure 1 is an elevation showing the resilientsupporting member, the socket and lamp.

Figure 2 is a vertical sectional view of the resilient support showingthe socket therebelow.

Figure 3 is a sectional view of a universal connection to the resilientsupport, showing the latter and the socket therebelow.

Like numera s of reference indicate corresponding parts in the variousfigures.

Referring to the drawings, the casing 1 is formed of the barrel portion2 preferably made of fibre or other insulating material, the cap 3 ofbrass screwed on to the fibre at one end and having the threaded orifice4, and the base 5 of brass screwed on to the fibre at the other end andhaving the central orifice 6.

The non-conductor tube 7 is internally threaded at its lower end 8 andexternally threaded at its upper end 9 and joined to the 1923. SerialNo. 643,193.

socket 10 by the threaded coupling 11 screwed into the internal thread 8and into the socket'lO. The fibre disc 12 is screwed on the upper thread9 and the tube 7 is slotted at each side at 13 and 14 through saidthreads 9 for the sliding contacts 15 and 16.

The contacts 15 and 16 are separated by the fibre division strip 17 towhich they are held by the rivets 18 and. 19 and from the latter theyextend outwardly up to and through said slots 13 and 14 in the offsets20 and 21,-which,

are inwardly turned at the ends 22and-23. The contacts 15 and 16 thusform springs from the rivets 18 and 19 which hold them firmly thoughresiliently to the vertical cont-acts 24 and 25 secured by the rivets 26and 27 to the barrel. I A

Tl1e'c0ntacts24 and 25-a1'e strips of con ducting metal extending forthe greater portion of the length of the barrel 2 on the inner wallsurface and at their outer ends 28 and 29 to receive the binding screws30 and 31.

The contacts 15 and 16 are offset outwardly at their inner-ends andsolderedto the insulated wires 32 and 33 which are connectedto the postsin the socket 10.

The lead wires from'the source of electric current here indicated by thenumerals-34 and 35 are connected to the offsets 28 and 29 of thecontacts 24 and 25 respectively and held by the binding screws 30 and.31and this insures a continuous connection from the lead wires to the lamp36, which is con-;

nected through the socket 10 as usual in 45 is situated within thebarrel 2 and encir-.

cles the central non-conducting tube between the washer at the upper endand the base.

The attachment of this device is so dependent on the electric wiring ofthe building that it is hardly possible to show a universal adapter butwhere the cap or tubular joint member cannot be directly secured to theconduits then any suitable. form of adapter is used.

The shock absorber hangs from the rigidly secured cap or joint memberand when vibratory movements occur in the building, vehicle or otherplace the inner non-conductor tube draws out against the strength of thespring 45, which is compressed at each outward movement, thereby drawingthe socket and lamp back to their normal hang ing position, that is tosay the lamp is cushioned against all movements and in Figure 3 theuniversal joint allows side play also.

What we claim is c 1. In a shock absorber for electric devices, a casingadapted to be secured to electric connections, a tubularmen'iberrecipi-ocally arranged in said casing, a socket supported bysaid tubular member, fixed contacts in said casing, spring contacts insaid tubular member and pro ecting there from into engagement with saidfixed con-- tact's, a spring stop on said tubular member and a springencircling said tubular member between thespring stop and the base ofthe therefrom into engagement with said fixed contacts, a spring stop onsaidtubular member and a spring encircling said tubular meinber'betweenthe spring stop and the base of the casing and resiliently supportingsaid socket from said casing,

3. In a shock absorber for electric devices, a casing adapted to besecured toelectrio connections. a tubular member threaded at the endsand formed of non-conducting material, a socket supported by saidtubular member, fixed contacts in said casing, spring contacts in saidtubular member and proj ecting therefrom into engagement with saidfixedcontacts, a spring stop on said tubular member and a springencircling said tubular member between the spring stop and the base ofthe casing and resiliently supporting said socket from said casing.

4. In a shock absorber for electric devices, a casing adapted to besecured to electric connections, a tubular member reciprocally arrangedin said casing, a socket supported by said tubular member, metal stripsof con ducting material forming fixed contacts and offset at the upperends and carrying binding screws, spring contacts in said tubular memberand projecting therefrom into e'iigagement with said fixed contacts, aspring stop on said tubular member between the spring stop and the baseof the casing and resiliently supportingsaid socket from said casing. vd

5. In a shock absorber for electric devices, a casing" adapted to besecured to electric connections, a tubular member reciprocally arrangedin said casing, a socket supported by said tubular member, fixedcontacts in said casing, a non-conducting divisional strip verticallyseparatin'gthe interior of said tubular member, a spring contact securedto said strip and projecting upwardly and outwardly therefrom to onefixed contact and at the inner end soldered to an electric connection, aspring contact secured to the other side of said strip and projectingupwardly and outwardly therefrom to the other fixed contact and at theinner end soldered to an electric connection, a spring stop on saidtubular member and a spring encircling said tubular member between thespring stop and the of the'casing and resiliently supporting said socketfrom said casing.

Signed at Sherbrooke, Quebec, Canada,

this tenth day of May, 1923.

JAMES REGINALD MOLE. \YILLIAM ALLAN UOUGrHLAN.

